Which one of the following is a sequential electronic circuit that is used to store 1-bit information ?

A flip-flop is the fundamental building block of digital electronics and sequential logic circuits. It is a bistable multivibrator, meaning it has two stable states that can represent a binary 0 or 1, allowing it to store exactly one bit of information. The other options are related but distinct:

• Registers are groups of multiple flip-flops used to store data words (e.g., 8-bit or 32-bit).
• Counters are sequential circuits, typically constructed from flip-flops, used to count clock pulses.
• An Accumulator is a specific type of register inside a CPU that stores intermediate results of arithmetic and logic operations.

Since the question asks for the basic circuit used to store 1-bit information, the flip-flop is the correct answer.